高压电器2012，Vol.48Issue(8)：94-98,5.
500kV罐式断路器电流互感器二次回路接线错误的分析及对策
Analysis on Connection Error in Current Transformer Secondary Circuit of 500 kV Tank Circuit Breaker with Countermeasures
摘要
Abstract
A hidden danger owing to connection error in the current transformer secondary circuit of 500 kV tank circuit breaker is introduced. When the 500 kV tank circuit breaker went wrong, the main protections did not trip to clear the fault because current transformer windings for respective line protection and bus protection had not been cross-connected hence two protection ranges did not overlapped and main protection did not work. The protection dead zone is found to be due to some problems in both design and installation of the current transformer through checking and analyzing the current transformer winding. Consequently, some countermeasures' for avoiding the protection dead zone are suggested, such as strengthening cooperation between primary and secondary builders during design and installation stage, and paying more attention to examinations in construction, acceptance and daily maintenance stages.关键词
500 kV罐式断路器/保护死区/二次回路/电流互感器绕组/反事故措施Key words
500 kV tank circuit breaker/protection dead zone/secondary circuit/current transformer winding/countermeasure分类
信息技术与安全科学引用本文复制引用
杨忠礼,牛元泰,吴征,任平力..500kV罐式断路器电流互感器二次回路接线错误的分析及对策[J].高压电器,2012,48(8):94-98,5.
